New enhancements will come with Module 2 that really help customize
your character. Turbine annouced that almost everyone will have
something new to choose from (even those players already at level 10):

New Energy Resistance
Enhancements

After extended periods of exposure to the elements, or after hours of
dedicated practice, some characters have begun developing limited
resistances to elemental damage. Rogues, through study of the traps
they may face, can learn to blunt the effects of fire, acid, cold,
sonic, and electric damage; rangers and barbarians can draw on their
knowledge of wilderness lore to gain resistances to fire, cold, or
acid; dwarves can get in touch with their inner rock, becoming
resistant to sonic and fire damage.

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